Abstract
The final stadium larva of Megalestes heros Needham, 1930 is redescribed and illustrated in detail. It is characterized by having a long and cylindrical body, a very long prementum with two end hooks of unequal size on lateral lobe, parallel wing sheaths, long and slender legs, female ovipositor short reaching the basal third of S10, and based on a distinct abdominal color pattern. The major diagnostic characters of the larvae of the genus Megalestes are as follows: (1) body smooth and slender, with long abdomen and leaf-shaped caudal gills; (2) antenna filiform, seven-segmented,third segment longest; (3) median cleft present in median lobe of prementum; lateral lobe with two end hooks of unequal size, the inner one being longer and larger than the outer, movable hook without setae; (4) wing sheaths parallel to each other.
References
Chao, H.-F. (1947) On the systematic position, nymphal characters and new species of the genera Megalestes Selys and Sinolestes Needham (Odonata). Biological Bulletin of Fukien Christian University, 6, 15–25.
Laidlaw, F.F. (1920) Notes on some interesting larvae of Dragonflies (Odonata) in the collection of the Indian Museum. Records of the Indian Museum, 19 (Part 5), 185–188.
Matsuki, K. & Lien, J.-C. (1978) Description of the larvae of three families of Zygoptera breeding in the streams of Taiwan (Synlestidae, Euphaeidae & Calopterygidae). Tombo, XXI, (1–4), 15–26.
Needham, J.G. (1911) Notes on a few nymphs of Agrioninae (Order Odonata) of the Hagen Collection. Entomological News, 22, 342–344.
Zhang, H.-M. (2019) Dragonflies and damselflies of China. Chongqing University Press, Chongqing, 12 + 1459 pp.